Obras do Porto Amarracao 0-4-0 Locomotives in Brazil
Class Details by Steve Llanso of Sweat House Media
Class 3 (Locobase 15157)
Data from DeGolyer, Volume 66, pp. 311+. See also "Piauf Central Railroad" (Google translation) in Wikipedia at [
], last accessed 9 December 2022. Works numbers were 56142-56143 in January 1923.
These saddle tanks operated in Piaui at the mouth of the Igaracu river, which had long served as a port on the Atlantic in Northeastern Brazil. Amarracao's Public Works (OPA) served that port and presumably was intended to convey cargoes to and from the Estrada de Ferro Central do Piauf .
The EFCP envisioned a link--Teresina-Parnaiba Railway--between Piaui State's capital and the town of Luis Correia at the port. Wikipedia reported a widely held opinion that the Parnaiba River's parallel course and traffic rendered this a white elephant. And indeed, its construction began in 1913 by a British-held company. But various disagreements and lack of funds contributed to a 56-year-long effort to complete its route to its terminus at Teresina in 1969.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 3 |
| Locobase ID | 15157 |
| Railroad | Obras do Porto Amarracao |
| Country | Brazil |
| Whyte | 0-4-0ST |
| Number in Class | 2 |
| Road Numbers | 3-4 |
| Gauge | Metre |
| Number Built | 2 |
| Builder | Baldwin |
| Year | 1923 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 4.50 / 1.37 |
| Engine Wheelbase (ft / m) | 4.50 / 1.37 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 4.50 / 1.37 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 28,300 / 12,837 |
| Engine Weight (lbs / kg) | 28,300 / 12,837 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 600 / 2.27 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 24 / 12 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 28 / 711 |
| Boiler Pressure (psi / kPa) | 175 / 1210 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 9" x 14" / 229x356 |
| Tractive Effort (lbs / kg) | 6024 / 2732.44 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.70 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 46 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 7.62 / 2.32 |
| Firebox Area (sq ft / m2) | 27 / 2.51 |
| Grate Area (sq ft / m2) | 5.10 / 0.47 |
| Evaporative Heating Surface (sq ft / m2) | 217 / 20.16 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 217 / 20.16 |
| Evaporative Heating Surface/Cylinder Volume | 210.51 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 893 |
| Same as above plus superheater percentage | 893 |
| Same as above but substitute firebox area for grate area | 4725 |
| Power L1 | 2789 |
| Power MT | 434.54 |